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Basic concept of probability and how AND and OR rule usually work. Little description on the complement rule with the help of visual example

Srijita Banerjee
B.Tech in Biotechnology\singer\loves teaching\public speaker\peer educator\Bengali

U
Maths papers provide karvabe
1. Introduction to Probability Probability SRIJITA BANERJEE https://unacademy.com/user/mampi

2. What is it? - Tricky topic - Basically a ratio P (# of success)/(total # of outcomes) 0 P 1 (Always in this range) P-0 : No success (which is impossible) P 1 Success happens every single time (Not possible)

3. What is the probability that a month name has 'R' in it?

4. What is the probability that a month name has 'R' in it? Let's make a list first

5. What is the probability that a month name has 'R' in it? Let's make a list first January February March April May June - September -October - November December - July August

6. What is the probability that a month name has 'R' in it? Let's make a list first January February March April May June - September October November December - July August

7. What is the probability that a month name has 'R' in it? Considering the above situation: Ans: 8/12

8. "RANDOM" - Every individual event is absolutely unpredictable The overall pattern of the event is completely predictable Let's take the example of a coin:

9. COMPLEMENT RULE P(A): The probability of event A So, according the rule that we studied 0xP(A)<1 Again going through the previous concepts: P(A)= 0 A is impossible P (A)= 1 A is certain or guaranteed

10. What is complement rule? Complement of A = not A Let's consider an example P(not A)1- P(A)